U.S. Geological Survey Stereoscopic of Sentinel Rock by E.O. Beaman

U.S. Geological Survey Stereoscopic of Sentinel Rock by E.O. Beaman
The now submerged Sentinel Rock at the mouth of Sentinel Creek within Glen Canyon. To the right is the Colorado River. | Creator: E.O. Beaman | Date: 1871 | Source: https://www.flickr.com/photos/usgeologicalsurvey/16299081083/in/photolist-qQi3Xn | Rights: https://www.flickr.com/photos/usgeologicalsurvey/16299081083/in/photolist-qQi3Xn
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